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Where did the memory go? MoBo or Vista?


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I have 4GB memory installed on my Asus P5W DH Deluxe board. When I select the BIOS...it shows:

Installed Memory: 4096

Appropriated Memory: 1408

I have used VistaBoot 3.1 to turn on DEP and PAE...no go.

Asus says it is the Operating System.

I have 2 ASUS EAX1650PRO Crossfire cards installed.

Below is my System Profile where Total System Memory

should read 4096 MB and/or something close to that.

Anyone know how to acheive the full memory?




OS Name Microsoft® Windows Vista™ Ultimate

Version 6.0.6000 Build 6000

Other OS Description Not Available

OS Manufacturer Microsoft Corporation

System Name P-III-1

System Manufacturer USTEK COMPUTER INC

System Model P5W DH Deluxe

System Type X86-based PC

Processor Intel® Pentium® D CPU 3.40GHz, 3400 Mhz, 2 Core(s), 2 Logical Processor(s)

BIOS Version/Date American Megatrends Inc. 1901, 1/24/2007

SMBIOS Version 2.4

Windows Directory C:\Windows

System Directory C:\Windows\system32

Boot Device \Device\HarddiskVolume1

Locale United States

Hardware Abstraction Layer Version = "6.0.6000.16407"

User Name P-III-1\Joe

Time Zone Central Daylight Time

Total Physical Memory 2,686.50 MB

Available Physical Memory 1.67 GB

Total Virtual Memory 6.45 GB

Available Virtual Memory 5.42 GB

Page File Space 3.91 GB

Page File L:\pagefile.sys




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Altho 4gigs is the max for 32bit Vista, the top memory addressing of that is allocated to your mobo devices, hardware. Graphics cards, especially with 512mb mem or more can push down your usable system RAM to below 3gb. Whats your graphics card?

Edited by amenx
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32 bit versions of windows can only adresss 4gb of memory including your system ram, your from from your videcard, and your ram instaled in your mobo, if you do some math u will realize the following = 4GB RAM - 512*2 RAM( your 2 videocards) - Memory on your mobo - Memory on your CPU = do the math and thats like -3GB ram, remove one Video card and your ram will increase. sorry for my english xD.

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